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WO2010038350A1 - Terminal device and connection switching management method - Google Patents

Terminal device and connection switching management method Download PDF

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Publication number
WO2010038350A1
WO2010038350A1 PCT/JP2009/004015 JP2009004015W WO2010038350A1 WO 2010038350 A1 WO2010038350 A1 WO 2010038350A1 JP 2009004015 W JP2009004015 W JP 2009004015W WO 2010038350 A1 WO2010038350 A1 WO 2010038350A1
Authority
WO
WIPO (PCT)
Prior art keywords
server
terminal
communication network
input
service
Prior art date
Application number
PCT/JP2009/004015
Other languages
French (fr)
Japanese (ja)
Inventor
哲也 酒井
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to US13/121,639 priority Critical patent/US20110185054A1/en
Priority to CN2009801383520A priority patent/CN102172080A/en
Publication of WO2010038350A1 publication Critical patent/WO2010038350A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/08Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/083Network architectures or network communication protocols for network security for authentication of entities using passwords
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06Authentication
    • H04W12/062Pre-authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H04W36/0038Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of security context information

Definitions

  • the present invention relates to a terminal device and a connection switching management method.
  • WLAN Wireless Local Area Network
  • 3G system third generation mobile communication system
  • a terminal device (hereinafter referred to as a terminal) is located in an area where the coverage areas of a plurality of different communication networks overlap, that is, any of the plurality of communication networks as a communication path with a server that is a service provider. If it is usable, for example, the connection is switched to a communication network having a higher communication speed (see, for example, Patent Document 1). For example, when a terminal connected to a 3G system communication network moves to an area where the cover area of the 3G system communication network and the coverage area of the WLAN communication network overlap, the terminal can realize higher speed transmission than the 3G system. Switch the connection to the WLAN communication network.
  • an independent IP address (local address) is assigned to each device such as a server and a terminal for each communication network.
  • the server A, the server B, the terminal B, the GW1, and the GW2 are assigned different IP addresses, and each device is distinguished.
  • different IP addresses are assigned to the respective devices. That is, in each of the networks A, B, and C shown in FIG.
  • an IP address is assigned to a device located in the own network regardless of other communication networks.
  • a part of the cover area of the net A includes a part of the cover area of the net B.
  • the network B can transmit at a higher speed than the network A, for example, and has a higher priority than the network A used for communication between the terminal and the server. That is, in the communication between the terminal A and the server A, when both the network A and the network B can be used (that is, when the terminal A is located in the network B), the network B has priority. Is done.
  • password authentication is performed between the terminal A located in the network A and the server A located in the network C shown in FIG. That is, terminal A communicates with server A located in network C via network A as a communication path. Further, when performing password authentication, the server A distinguishes a plurality of terminals that request the service of its own server based on the IP address of the request source that requests the service of its own server.
  • Fig. 2 shows a sequence diagram when password authentication is performed between the terminal A and the server A.
  • terminal A designates server A as a service provider.
  • the terminal A transmits a screen display request addressed to the server A to the GW 1 between the network A and the network C shown in FIG.
  • the GW 1 converts the transmission source address of the display request from the terminal A into its own IP address (IP-A) of the network C, and transmits the display request with the transmission source address converted to the server A.
  • IP-A IP address
  • server A determines that password authentication is necessary for the received display request, and in ST5, the password input data for requesting password input as a response to the display request is sent to the display request source (IP- A) is transmitted to GW1.
  • the GW 1 transmits the password input data from the server A to the terminal A by performing address conversion (address reverse conversion) opposite to the address conversion in ST3.
  • IP-A IP address
  • terminal A displays a password request screen.
  • FIG. 3 A flow of communication network connection switching processing in terminal A is shown in FIG.
  • the terminal A becomes communicable with the server A via the network B, that is, when the terminal A is already connected to the network B (ST101: YES)
  • the network is used as a communication path with the server A.
  • the connection is switched from A to network B (ST102). Note that if the terminal A is not connected to the network B (ST101: NO), the terminal A communicates with the server A via the network A as it is.
  • the terminal A inputs a password (“1234” in FIG. 2) on the password request screen displayed in ST7.
  • terminal A transmits the password addressed to server A to GW 2 between network B and network C shown in FIG. That is, the transmission destinations (GW1 and GW2) to which the terminal A transmits information addressed to the server A are different between the transmission of the display request of ST2 and the transmission of the password of ST10.
  • GW2 like GW1 in ST3, converts the password source address from terminal A into its own IP address (IP-B) of network C, and converts the password in which the source address is converted into server A. Send to.
  • IP-B IP address
  • the server A distinguishes terminals based on the IP address. Therefore, since the transmission destination address of the password input data is IP-A, the transmission source address of the password is IP-B, so that the server A recognizes that the password is transmitted from a different terminal and performs password authentication. It fails (ST12). That is, the server A determines that a password has been transmitted from a terminal (IP-B) that has not requested transmission of a password, or determines that a password has not been transmitted from a terminal (IP-A) that has requested transmission of a password. . In ST13, the server A transmits a password authentication result (failure) as a response to the password transmission to the GW 2 that is the password transmission source (IP-B). In ST14, the GW 2 performs address reverse conversion and transmits a password authentication result (failure) to the terminal A. In ST15, terminal A displays the authentication result.
  • the server A recognizes the transmission destination terminal that transmitted the password input data and the password transmission source terminal as different terminals.
  • An object of the present invention is to provide a terminal device and a connection switching management method capable of switching a connection to a more suitable communication network while normally executing a service from a server.
  • the terminal device of the present invention includes a management unit that manages connection switching between the first communication network and the second communication network as a communication path between the own device and a server that is providing a service to the own device; Input means for performing an operation input to a service, and the management means includes information for requesting a reply by the operation input when the operation input is detected or data transmitted from the server In such a case, the connection switching is not performed.
  • the connection switching management method of the present invention is a connection switching for managing connection switching between a first communication network and a second communication network as a communication path between a terminal device and a server providing a service to the terminal device.
  • the connection switching is not performed when an operation input to the service is detected, or when data transmitted from the server includes information requesting a reply by the operation input.
  • connection switching to a more suitable communication network can be performed while the service from the server is normally executed.
  • Diagram showing communication system Conventional password authentication sequence diagram
  • the figure which shows the flow of the connection switching process of the conventional communication network The block diagram which shows the structure of the terminal which concerns on Embodiment 1 of this invention.
  • Sequence diagram of password authentication according to Embodiment 1 of the present invention The figure which shows the flow of the connection switching process of the communication network which concerns on Embodiment 1 of this invention.
  • the figure which shows an example of the HTML tag which concerns on Embodiment 3 of this invention The figure which shows the example of execution of the HTML data which concerns on Embodiment 3 of this invention
  • one of the first communication network for example, network A shown in FIG. 1 and the second communication network (for example, network B shown in FIG. 1) is used as the communication path between the terminal and the server.
  • the second communication network is used with priority over the first communication network.
  • the priority of the communication network for example, it may be set according to the specification of the communication system, the communication cost, the communication network congestion response, the communication speed, and the like.
  • FIG. 4 shows the configuration of terminal 100 according to the present embodiment.
  • the input unit 101 performs an operation input for a service provided by the server. For example, when a password input is requested from the server, the input unit 101 inputs a password in response to the password input request. Then, the input unit 101 outputs operation input information, which is information input by operation (for example, a password input by operation), to the input management unit 102.
  • operation input information which is information input by operation (for example, a password input by operation)
  • the input management unit 102 manages the output of operation input information to an application that operates as a service corresponding to the operation input information input from the input unit 101. For example, the input management unit 102 outputs the operation input information input from the input unit 101 to the execution unit 103 that executes an application that operates as a service corresponding to the operation input information. Further, the input management unit 102 outputs the operation input information to the switching management unit 108.
  • the execution unit 103 uses the operation input information input from the input management unit 102 or the received data from the server input from the transmission unit 104 to execute an application that operates as a service provided by the server. For example, when a password input request is input as received data from the server, the execution unit 103 executes the application using operation input information indicating a password. Then, the execution unit 103 transmits transmission data that is an execution result of the application to the server via the transmission unit 104.
  • the transmission unit 104 communicates transmission data and reception data between the execution unit 103 and the server via either the first communication network or the second communication network. Specifically, in accordance with the switching instruction from the switching management unit 108, the transmission unit 104 transmits connection control information indicating which of the first communication network and the second communication network is used to communicate with the server. The data is output to the first communication unit 105 using the first communication network and the second communication unit 106 using the second communication network. For example, when switching the connection of the communication network, the transmission unit 104 requests the one of the first communication unit 105 and the second communication unit 106 that is currently used as the communication path to release the connection with the server, and after switching the connection The other side used as the communication path is requested to connect to the server.
  • the transmission unit 104 transmits and receives transmission data and reception between the server and the execution unit 103 via the communication unit (the first communication unit 105 or the second communication unit 106) connected to the server by switching the connection of the communication network. Perform data communication. Further, the transmission unit 104 outputs connection state information indicating a connection state between the own terminal and the server among the received data from the server to the switching management unit 108.
  • the connection state information includes, for example, information indicating a state in which a service request is transmitted from the execution unit 103 to the server, or information indicating a state in which a response to the request of the execution unit 103 is transmitted from the server.
  • the first communication unit 105 uses the first communication network (for example, the network A shown in FIG. 1) as a communication path for communication with the server according to the connection control information input from the transmission unit 104, the first communication unit 105 receives from the server. Communication of data and transmission data from the terminal is performed via the first communication network. In addition, the first communication unit 105 sends first connection information indicating whether or not the first communication network is usable, that is, whether or not the own terminal is connected to the first communication network, to the switching management unit 108. Output.
  • the first communication network for example, the network A shown in FIG. 1
  • the first communication unit 105 receives from the server. Communication of data and transmission data from the terminal is performed via the first communication network.
  • the first communication unit 105 sends first connection information indicating whether or not the first communication network is usable, that is, whether or not the own terminal is connected to the first communication network, to the switching management unit 108. Output.
  • the second communication unit 106 uses the second communication network (for example, the network B shown in FIG. 1) as a communication path for communication with the server according to the connection control information input from the transmission unit 104, the second communication unit 106 receives from the server. Communication of data and transmission data from its own terminal is performed via the second communication network. The second communication unit 106 also sends second connection information indicating whether or not the second communication network is usable, that is, whether or not the terminal is connected to the second communication network, to the switching management unit 108. Output.
  • the second communication network for example, the network B shown in FIG. 1
  • the second communication unit 106 receives from the server. Communication of data and transmission data from its own terminal is performed via the second communication network.
  • the second communication unit 106 also sends second connection information indicating whether or not the second communication network is usable, that is, whether or not the terminal is connected to the second communication network, to the switching management unit 108. Output.
  • the time measuring unit 107 is the time when the information is input. The elapsed time from is timed. Then, when the elapsed time exceeds a preset time, the time measuring unit 107 outputs time information indicating that the preset time has elapsed to the switching management unit 108.
  • the switching management unit 108 manages connection switching between the first communication network and the second communication network as a communication path between the own terminal and the server. Specifically, the switching management unit 108 first uses available communication based on the first connection information input from the first communication unit 105 and the second connection information input from the second communication unit 106. Identify the net. For example, when the second communication network that is prioritized over the first communication network that is currently connected (for example, faster than the first communication network) can be used, the switching management unit 108 The transmission unit 104 is instructed to switch the connection from the first communication network to the second communication network.
  • the switching management unit 108 when the connection status information input from the transmission unit 104 includes a response from the server to the request of the terminal itself, the switching management unit 108 outputs the connection status information to the time measuring unit 107. Then, when time information is input from the time measuring unit 107 (that is, when a preset time has elapsed), the switching management unit 108 instructs the transmission unit 104 to perform connection switching. However, if the switching management unit 108 detects operation input information from the input management unit 102 before the time information is input from the time measuring unit 107, the switching management unit 108 does not switch the connection of the communication network. Instruct.
  • password authentication will be described as an example of a service between the terminal 100 and the server.
  • the terminal 100 is located on the network A shown in FIG. 1 and performs password authentication with the server A located on the network C. Further, the terminal 100 communicates with the server A via the network A as a communication path. Further, when performing password authentication, the server A distinguishes a plurality of terminals based on the IP address of the request source requesting the service.
  • FIG. 5 shows a sequence diagram when password authentication is performed between the terminal 100 and the server A.
  • the same processes as those in FIG. 5 are identical processes as those in FIG. 5
  • terminal 100 determines whether or not to switch connection from network A to network B as a communication path with server A.
  • switching management section 108 determines whether or not operation input information is input from input management section 102.
  • operation input information is not detected, that is, when there is no input of operation input information (ST103: NO)
  • the process proceeds to ST102.
  • the switching management unit 108 does not perform connection switching (ST102) of the communication network.
  • the transmission unit 104 does not perform communication network connection switching even when connection switching to a communication network with a higher priority is possible.
  • the switching management unit 108 detects the operation input information from the input management unit 102 and instructs the transmission unit 104 not to switch the communication network connection (ST102 shown in FIG. 6). Instruct.
  • the terminal 100 transmits the password addressed to the server A to the GW1 shown in FIG. 1 in the same manner as the transmission of the display request in ST2.
  • GW1 converts the source address of the password from terminal 100 into its own IP address (IP-A) of network C, and transmits the password with the source address converted to server A. To do.
  • IP-A IP address
  • the server A recognizes that the password is transmitted from the same terminal as the password input data transmission destination because the password input data transmission destination address is IP-A and the password transmission source address is IP-A.
  • the password authentication is successful (ST19).
  • server A transmits, for example, next screen data, which is the next screen of the password input screen, to GW1, which is a password transmission source (IP-A).
  • GW1 performs address reverse conversion and transmits next screen data to terminal 100.
  • terminal 100 displays next screen data.
  • the terminal 100 determines that there is a relationship between a plurality of requests transmitted before and after the operation input, and does not perform connection switching of the communication network. Therefore, it is possible to prevent the service from being continued by switching the communication network connection between a plurality of requests related to each other. That is, when the terminal 100 detects an operation input, the server 100 also serves as a server during this request (ST17 password transmission shown in FIG. 5) in the communication network connected at the previous request (ST2 display request shown in FIG. 5). It is possible to connect to the server via the same communication network (here, network A shown in FIG. 1) as the previous request transmission.
  • the terminal does not perform connection switching even when the connection switching of the communication network is possible when the operation input is detected. That is, the terminal can continue the service including the plurality of requests by restricting the switching of the communication network connection between the plurality of requests related to each other.
  • the terminal switches the communication network connection.
  • more suitable communication can be performed with the server. Therefore, according to the present embodiment, connection switching to a more suitable communication network can be performed while the service from the server is normally executed.
  • Embodiment 2 Depending on the server, even if the communication path with the terminal is changed between a plurality of requests that are related to each other, such as password authentication, the service can be continued without problems. For example, suppose that the server assigns a unique identifier to a request together with a password input request. The server then instructs the terminal to send a password along with its unique identifier. As a result, even if the destination IP address of the password input request at the time of password input request is different from the password source IP address at the time of password reception, the server can use the password from the same terminal as long as the unique identifier is the same. Can be determined.
  • the terminal When the terminal is provided with a service from a server that can accurately distinguish the terminal even when the communication path is changed as described above, the terminal performs connection switching management of the communication network described in the first embodiment. There is no need. In other words, the connection of the communication network described in the first embodiment is performed only when the terminal is provided with a service from a server that causes a problem that the service cannot be continued if the connection of the communication network is switched while providing the service. Switching may be performed.
  • the terminal stores a server that causes a problem that the service cannot be continued if the connection of the communication network is switched while providing the service, and the server that provides the service to the terminal stores the server. Do not switch connection of communication network if it matches with the current server.
  • FIG. 7 shows the configuration of terminal 200 in the present embodiment.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the storage unit 201 stores a server in which there is a problem that the service cannot be continued if the connection of the communication network is switched while the service is being provided.
  • the storage unit 201 stores the IP address of the server.
  • the storage unit 201 may store in advance a server that causes a problem that the service cannot be continued if the connection of the communication network is switched while the service is being provided.
  • the terminal 200 may update the server information stored in the storage unit 201 based on information notified from the system. Or the terminal 200 may determine the server memorize
  • the switching management unit 108 receives operation input information from the input management unit 102 and further includes information on the server that provides the service to the terminal itself (for example, the IP address of the server). Information is input from the transmission unit 104. Then, the switching management unit 108 detects the operation input information, and the server indicated by the server information included in the connection state information (that is, the server that provides the service to its own terminal) is stored in the storage unit 201. If it matches the existing server, the transmission unit 104 is instructed not to switch the connection of the communication network.
  • terminal 200 communicates with a server stored in storage unit 201 (that is, a server that cannot continue a service due to communication network connection switching between a plurality of requests).
  • a server stored in storage unit 201 that is, a server that cannot continue a service due to communication network connection switching between a plurality of requests.
  • terminal 200 is communicating with a server that is not stored in storage unit 201 (that is, a server that supports communication network connection switching between a plurality of requests).
  • a server that is not stored in storage unit 201 that is, a server that supports communication network connection switching between a plurality of requests.
  • the connection of the communication network can be switched when a better connection to the communication network is possible regardless of whether or not there is an operation input.
  • FIG. 8A shows an example of an HTML (Hyper Text Markup Language) tag included in password input data (FIGS. 2 and 5) requesting password input as an example of a response from the server to a terminal request.
  • HTML Hyper Text Markup Language
  • the first and sixth lines indicate HTML data.
  • the form element in the second to fifth lines indicates the definition of the reply method from the terminal to the server, and the input element indicates the input format of the reply data.
  • input password: at the top of the third line in FIG. 8A is simply a display description indicating what input is to the user.
  • the contents shown in the upper part of FIG. 8B are displayed. Specifically, as shown in the upper part of FIG. 8B, a reply editing area is displayed corresponding to the third line in FIG. 8A, and a reply sending button is displayed corresponding to the fourth line in FIG. 8A.
  • the URL Uniform Resource Locator
  • http: // indicates that the protocol used for communication with the server is HTTP (Hyper Text Text Transfer Protocol)
  • HTTP Hyper Text Text Transfer Protocol
  • 0.html is the reply specified in the second line of FIG. 8A.
  • the response from the server to the request for the terminal may include information for requesting the reply of the terminal by the operation input (the password in FIGS. 8A and 8B).
  • the HTML tag is included, it can be determined that the terminal itself needs to further reply to the data (response) from the server. That is, when the data transmitted from the server includes information requesting a reply from the terminal by an operation input, the terminal configures a plurality of requests that the terminal transmits to the server before and after the data as one service. It is possible to determine that the requests are requests (related requests).
  • the terminal switches the communication network connection. Do not do.
  • terminal 100 (FIG. 4) according to the present embodiment, operation input information input from input management unit 102 to switching management unit 108 becomes unnecessary.
  • reception data for example, an HTML tag illustrated in FIG. 8A
  • the switching management unit 108 determines that the input unit 101 performs an operation input process on the received data. That is, when the data received from the server includes information requesting a reply by an operation input, the switching management unit 108 determines that there is a relationship between a plurality of requests transmitted before and after the received data. The communication network connection is not switched.
  • the switching management unit 108 determines that the input unit 101 does not perform operation input for the received data. In this case, the switching management unit 108 instructs the transmission unit 104 to switch the communication network if connection switching to a more suitable communication network is possible.
  • the terminal 100 does not switch the connection of the communication network while a service including a plurality of requests related to each other is performed. Therefore, according to the present embodiment, the same effect as in the first embodiment can be obtained.
  • the operation input is not limited to the password input, and may be, for example, a mail edit, an electronic bulletin board, or a character input in chat.
  • the present invention can be applied to communication systems and the like.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Provided is a terminal device which can perform connection switching to a more appropriate communication network while normally executing a service from a server.  The terminal device includes: an input unit (101) which operation-inputs a service provided by a server and outputs to an input management unit (102), the operation input information as information which has been operation-inputted; the input management unit (102) which manages output of the operation input information to an application operating as a service corresponding to the operation input information inputted from the input unit (101); and a switching management unit (108) which performs switching between a first communication network and a second communication network as a communication route between the local device and the server which is providing a service to the local device.  Upon detection of operation input information inputted from the input management unit (102), the switching management unit (108) cannot perform switching of the communication network.

Description

端末装置および接続切り替え管理方法Terminal device and connection switching management method
 本発明は、端末装置および接続切り替え管理方法に関する。 The present invention relates to a terminal device and a connection switching management method.
 今後の通信システムにおいては、WLAN(Wireless Local Area Network),第3世代移動通信システム(3Gシステム)等の様々な通信技術が混在し、複数の通信技術の通信網のカバーエリアが重複するようになるものと考えられる。 In future communication systems, various communication technologies such as WLAN (Wireless Local Area Network) and third generation mobile communication system (3G system) will be mixed, so that the coverage areas of multiple communication technologies will overlap. It is considered to be.
 端末装置(以下、端末という)は、互いに異なる複数の通信網のカバーエリアが重複するエリアに位置する場合、つまり、サービスの提供元であるサーバとの通信経路として、複数の通信網のいずれも使用可能である場合には、例えば、通信速度がより高速である通信網に接続を切り替える(例えば、特許文献1参照)。例えば、3Gシステムの通信網に接続している端末は、3Gシステムの通信網のカバーエリアとWLANの通信網のカバーエリアとが重複するエリアに移動した場合、3Gシステムよりも高速伝送を実現できるWLANの通信網に接続を切り替える。 A terminal device (hereinafter referred to as a terminal) is located in an area where the coverage areas of a plurality of different communication networks overlap, that is, any of the plurality of communication networks as a communication path with a server that is a service provider. If it is usable, for example, the connection is switched to a communication network having a higher communication speed (see, for example, Patent Document 1). For example, when a terminal connected to a 3G system communication network moves to an area where the cover area of the 3G system communication network and the coverage area of the WLAN communication network overlap, the terminal can realize higher speed transmission than the 3G system. Switch the connection to the WLAN communication network.
特開2004-023768号公報JP 2004-023768 A
 しかしながら、端末とサーバとの間でサービスを実行中に、通信網の切り替えが発生すると、サービスを継続できない場合が生じてしまう。以下、パスワード認証を一例として説明する。ここでは、図1に示す通信システムにおける網A,B,Cの各通信網では、サーバおよび端末等の各装置に対して通信網毎に独立のIPアドレス(ローカルアドレス)が付与される。例えば、網Cでは、サーバA、サーバB、端末B、GW1、GW2は、互いに異なるIPアドレスが付与され、各装置が区別される。図1に示す網Aおよび網Bでも、網Cと同様、各装置に互いに異なるIPアドレスが付与されている。すなわち、図1に示す網A,B,Cの各通信網では、自網に位置する装置に対して、他の通信網とは無関係にIPアドレスの割り当てを行う。また、網Aのカバーエリアの一部に、網Bのカバーエリアの一部が含まれる。また、網Bは、例えば、網Aよりも高速伝送が可能であり、端末とサーバとの間の通信に使用される優先度が網Aよりも高い。すなわち、端末AとサーバAとの間の通信において、網Aおよび網Bの双方が使用可能である場合(すなわち、端末Aが網Bに位置する場合)には、網Bが優先して使用される。 However, if the communication network is switched while the service is being executed between the terminal and the server, the service may not be continued. Hereinafter, password authentication will be described as an example. Here, in each of the networks A, B, and C in the communication system shown in FIG. 1, an independent IP address (local address) is assigned to each device such as a server and a terminal for each communication network. For example, in the network C, the server A, the server B, the terminal B, the GW1, and the GW2 are assigned different IP addresses, and each device is distinguished. In the network A and the network B shown in FIG. 1, similarly to the network C, different IP addresses are assigned to the respective devices. That is, in each of the networks A, B, and C shown in FIG. 1, an IP address is assigned to a device located in the own network regardless of other communication networks. Further, a part of the cover area of the net A includes a part of the cover area of the net B. Further, the network B can transmit at a higher speed than the network A, for example, and has a higher priority than the network A used for communication between the terminal and the server. That is, in the communication between the terminal A and the server A, when both the network A and the network B can be used (that is, when the terminal A is located in the network B), the network B has priority. Is done.
 また、ここでは、図1に示す網Aに位置する端末Aと網Cに位置するサーバAとの間でパスワード認証を行う。つまり、端末Aは、通信経路として網Aを経由して網Cに位置するサーバAと通信を行う。また、パスワード認証を行う際、サーバAは、自サーバのサービスを要求する要求元のIPアドレスに基づいて、自サーバのサービスを要求する複数の端末を区別する。 Further, here, password authentication is performed between the terminal A located in the network A and the server A located in the network C shown in FIG. That is, terminal A communicates with server A located in network C via network A as a communication path. Further, when performing password authentication, the server A distinguishes a plurality of terminals that request the service of its own server based on the IP address of the request source that requests the service of its own server.
 図2に端末AとサーバAとの間でパスワード認証を行う場合のシーケンス図を示す。図2に示すように、ステップ(以下、STという)1では、端末Aはサービスの提供元としてサーバAを指定する。 Fig. 2 shows a sequence diagram when password authentication is performed between the terminal A and the server A. As shown in FIG. 2, in step (hereinafter referred to as ST) 1, terminal A designates server A as a service provider.
 ST2では、端末Aは、サーバA宛ての画面の表示要求を、図1に示す網Aと網Cとの間のGW1に送信する。ST3では、GW1は、端末Aからの表示要求の送信元アドレスを網Cの自己のIPアドレス(IP-A)に変換して、送信元アドレスが変換された表示要求をサーバAへ送信する。 In ST2, the terminal A transmits a screen display request addressed to the server A to the GW 1 between the network A and the network C shown in FIG. In ST3, the GW 1 converts the transmission source address of the display request from the terminal A into its own IP address (IP-A) of the network C, and transmits the display request with the transmission source address converted to the server A.
 ST4では、サーバAは、受信した表示要求に対してパスワード認証が必要であると判断し、ST5において、表示要求の応答としてパスワード入力を要求するパスワード入力データを、表示要求の送信元(IP-A)であるGW1へ送信する。ST6では、GW1は、ST3におけるアドレス変換と逆のアドレス変換(アドレス逆変換)を行うことにより、サーバAからのパスワード入力データを端末Aへ送信する。このように、異なる通信網(ここでは、網Aおよび網C)の間で通信を行う場合、通信網間に接続されたGW(ここでは、GW1)がIPアドレスの変換を行うことにより、互いに異なる通信網に位置する装置(ここでは、網Aに位置する端末Aおよび網Cに位置するサーバA)間の通信を可能にしている。すなわち、網Aに位置する端末Aは、網Aと網Cとの間に位置するGW1のIPアドレス(IP-A)を用いて網Cに位置するサーバAと通信を行う。図1に示すGW2についても同様である。 In ST4, server A determines that password authentication is necessary for the received display request, and in ST5, the password input data for requesting password input as a response to the display request is sent to the display request source (IP- A) is transmitted to GW1. In ST6, the GW 1 transmits the password input data from the server A to the terminal A by performing address conversion (address reverse conversion) opposite to the address conversion in ST3. As described above, when communication is performed between different communication networks (here, network A and network C), GWs (here, GW1) connected between the communication networks perform IP address conversion, so that Communication between devices located in different communication networks (here, a terminal A located in the network A and a server A located in the network C) is enabled. That is, the terminal A located in the network A communicates with the server A located in the network C using the IP address (IP-A) of the GW 1 located between the networks A and C. The same applies to GW2 shown in FIG.
 ST7では、端末Aは、パスワード要求画面を表示する。 In ST7, terminal A displays a password request screen.
 ここで、端末Aが図1に示す網Aのカバーエリアと網Bのカバーエリアとが重複するエリアに移動したとする。この場合、網Bに接続した方が、網Aに接続するよりも高速伝送を実現することができるため、ST8では、端末Aは、サーバAとの通信経路として網Bに接続を切り替える。端末Aにおける通信網の接続切り替え処理の流れを図3に示す。図3に示すように、端末Aは、網Bを経由してサーバAと通信可能になった場合、つまり、網Bに接続済みの場合(ST101:YES)、サーバAとの通信経路として網Aから網Bに接続を切り替える(ST102)。なお、端末Aは、網Bに接続されていない場合(ST101:NO)、そのまま網Aを経由してサーバAと通信する。 Here, it is assumed that the terminal A moves to an area where the cover area of the network A and the cover area of the network B shown in FIG. In this case, since the connection to the network B can achieve higher speed transmission than the connection to the network A, the terminal A switches the connection to the network B as a communication path with the server A in ST8. A flow of communication network connection switching processing in terminal A is shown in FIG. As shown in FIG. 3, when the terminal A becomes communicable with the server A via the network B, that is, when the terminal A is already connected to the network B (ST101: YES), the network is used as a communication path with the server A. The connection is switched from A to network B (ST102). Note that if the terminal A is not connected to the network B (ST101: NO), the terminal A communicates with the server A via the network A as it is.
 ST9では、端末Aは、ST7で表示されたパスワード要求画面において、パスワード(図2では、‘1234’)を入力する。ST10では、端末Aは、サーバA宛てのパスワードを、図1に示す網Bと網Cとの間のGW2に送信する。すなわち、ST2の表示要求の送信時と、ST10のパスワード送信時とでは、端末AがサーバA宛ての情報を送信する送信先(GW1およびGW2)が異なる。ST11では、GW2は、ST3のGW1と同様、端末Aからのパスワードの送信元アドレスを網Cの自己のIPアドレス(IP-B)に変換して、送信元アドレスが変換されたパスワードをサーバAへ送信する。 In ST9, the terminal A inputs a password (“1234” in FIG. 2) on the password request screen displayed in ST7. In ST10, terminal A transmits the password addressed to server A to GW 2 between network B and network C shown in FIG. That is, the transmission destinations (GW1 and GW2) to which the terminal A transmits information addressed to the server A are different between the transmission of the display request of ST2 and the transmission of the password of ST10. In ST11, GW2, like GW1 in ST3, converts the password source address from terminal A into its own IP address (IP-B) of network C, and converts the password in which the source address is converted into server A. Send to.
 上述したようにサーバAは、IPアドレスに基づいて端末を区別する。よって、パスワード入力データの送信先アドレスがIP-Aであるのに対し、パスワードの送信元アドレスがIP-Bであるため、サーバAは、異なる端末からパスワードが送信されたと認識し、パスワード認証に失敗する(ST12)。つまり、サーバAは、パスワードの送信を要求していない端末(IP-B)からパスワードが送信されたと判断、または、パスワードの送信を要求した端末(IP-A)からパスワードが送信されないと判断する。ST13では、サーバAは、パスワード送信の応答としてパスワード認証結果(失敗)を、パスワードの送信元(IP-B)であるGW2へ送信する。ST14では、GW2は、アドレス逆変換を行い、パスワード認証結果(失敗)を端末Aへ送信する。ST15では、端末Aは、認証結果を表示する。 As described above, the server A distinguishes terminals based on the IP address. Therefore, since the transmission destination address of the password input data is IP-A, the transmission source address of the password is IP-B, so that the server A recognizes that the password is transmitted from a different terminal and performs password authentication. It fails (ST12). That is, the server A determines that a password has been transmitted from a terminal (IP-B) that has not requested transmission of a password, or determines that a password has not been transmitted from a terminal (IP-A) that has requested transmission of a password. . In ST13, the server A transmits a password authentication result (failure) as a response to the password transmission to the GW 2 that is the password transmission source (IP-B). In ST14, the GW 2 performs address reverse conversion and transmits a password authentication result (failure) to the terminal A. In ST15, terminal A displays the authentication result.
 このように、パスワード入力の要求とパスワードの送信との間の期間において、端末Aが通信網の接続切り替えを行うと、通信網の接続切り替えの前後において、端末Aの網CにおけるIPアドレスが異なってしまう。そのため、サーバAは、パスワード入力データを送信した送信先の端末と、パスワードの送信元の端末とを異なる端末として認識してしまう。 As described above, when the terminal A switches the connection of the communication network during the period between the password input request and the password transmission, the IP address in the network C of the terminal A differs before and after the connection switching of the communication network. End up. Therefore, the server A recognizes the transmission destination terminal that transmitted the password input data and the password transmission source terminal as different terminals.
 すなわち、パスワード認証におけるパスワード要求(図2に示すST2~ST6)およびパスワード送信(図2に示すST10~ST14)のように、要求とその要求に対する応答とを複数組み合わせてサービスを提供する際、その互いに関連がある複数の要求の間に異なる通信網(網Aまたは網B)への接続切り替え(図2に示すST8)が発生すると、要求毎の送信元(GW1またはGW2)が異なってしまう。そのため、サーバは、それぞれの要求を、互いに異なる端末からの要求であると判断してしまう。そのため、互いに関連のある複数の要求の間に異なる通信網への接続切り替えが発生すると、端末とその端末にサービスを提供するサーバとの間のサービスが継続できなくなる。 That is, when providing a service by combining a plurality of requests and responses to the requests, such as password requests in password authentication (ST2 to ST6 shown in FIG. 2) and password transmission (ST10 to ST14 shown in FIG. 2), When connection switching (ST8 shown in FIG. 2) to a different communication network (network A or network B) occurs between a plurality of requests related to each other, the transmission source (GW1 or GW2) for each request is different. Therefore, the server determines that each request is a request from a different terminal. Therefore, when connection switching to a different communication network occurs between a plurality of requests that are related to each other, service between the terminal and the server that provides the service to the terminal cannot be continued.
 本発明の目的は、サーバからのサービスを正常に実行しつつ、より適した通信網への接続切り替えを行うことができる端末装置および接続切り替え管理方法を提供することである。 An object of the present invention is to provide a terminal device and a connection switching management method capable of switching a connection to a more suitable communication network while normally executing a service from a server.
 本発明の端末装置は、自装置と、自装置にサービスを提供中のサーバとの間の通信経路としての第1の通信網および第2の通信網の接続切り替えを管理する管理手段と、前記サービスに対して操作入力を行う入力手段と、を具備し、前記管理手段は、前記操作入力を検出した場合、または、前記サーバから送信されるデータに前記操作入力による返信を要求する情報が含まれる場合、前記接続切り替えを行わない構成を採る。 The terminal device of the present invention includes a management unit that manages connection switching between the first communication network and the second communication network as a communication path between the own device and a server that is providing a service to the own device; Input means for performing an operation input to a service, and the management means includes information for requesting a reply by the operation input when the operation input is detected or data transmitted from the server In such a case, the connection switching is not performed.
 本発明の接続切り替え管理方法は、端末装置と、前記端末装置にサービスを提供中のサーバとの間の通信経路としての第1の通信網および第2の通信網の接続切り替えを管理する接続切り替え管理方法において、前記サービスに対する操作入力を検出した場合、または、前記サーバから送信されるデータに前記操作入力による返信を要求する情報が含まれる場合、前記接続切り替えを行わないようにした。 The connection switching management method of the present invention is a connection switching for managing connection switching between a first communication network and a second communication network as a communication path between a terminal device and a server providing a service to the terminal device. In the management method, the connection switching is not performed when an operation input to the service is detected, or when data transmitted from the server includes information requesting a reply by the operation input.
 本発明によれば、サーバからのサービスを正常に実行しつつ、より適した通信網への接続切り替えを行うことができる。 According to the present invention, connection switching to a more suitable communication network can be performed while the service from the server is normally executed.
通信システムを示す図Diagram showing communication system 従来のパスワード認証のシーケンス図Conventional password authentication sequence diagram 従来の通信網の接続切り替え処理の流れを示す図The figure which shows the flow of the connection switching process of the conventional communication network 本発明の実施の形態1に係る端末の構成を示すブロック図The block diagram which shows the structure of the terminal which concerns on Embodiment 1 of this invention. 本発明の実施の形態1に係るパスワード認証のシーケンス図Sequence diagram of password authentication according to Embodiment 1 of the present invention 本発明の実施の形態1に係る通信網の接続切り替え処理の流れを示す図The figure which shows the flow of the connection switching process of the communication network which concerns on Embodiment 1 of this invention. 本発明の実施の形態2に係る端末の構成を示すブロック図The block diagram which shows the structure of the terminal which concerns on Embodiment 2 of this invention. 本発明の実施の形態3に係るHTMLタグの一例を示す図The figure which shows an example of the HTML tag which concerns on Embodiment 3 of this invention 本発明の実施の形態3に係るHTMLデータの実行例を示す図The figure which shows the example of execution of the HTML data which concerns on Embodiment 3 of this invention
 以下、本発明の実施の形態について、添付図面を参照して詳細に説明する。以下の説明では、端末とサーバとの間の通信経路として、第1の通信網(例えば、図1に示す網A)および第2の通信網(例えば、図1に示す網B)のいずれか1つを用いる。また、以下の説明では、第2の通信網は、第1の通信網よりも優先して用いられる。通信網の優先度の基準としては、例えば、通信システムの仕様、通信費、通信網の輻輳対応、通信速度等によって設定されることが考えられる。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, one of the first communication network (for example, network A shown in FIG. 1) and the second communication network (for example, network B shown in FIG. 1) is used as the communication path between the terminal and the server. Use one. In the following description, the second communication network is used with priority over the first communication network. As a reference for the priority of the communication network, for example, it may be set according to the specification of the communication system, the communication cost, the communication network congestion response, the communication speed, and the like.
 (実施の形態1)
 本実施の形態に係る端末100の構成を図4に示す。
(Embodiment 1)
FIG. 4 shows the configuration of terminal 100 according to the present embodiment.
 図4に示す端末100において、入力部101は、サーバが提供するサービスに対して操作入力を行う。例えば、サーバからパスワード入力を要求された場合、入力部101は、パスワード入力の要求に対してパスワードを入力する。そして、入力部101は、操作入力された情報(例えば、操作入力されたパスワード)である操作入力情報を入力管理部102に出力する。 In the terminal 100 shown in FIG. 4, the input unit 101 performs an operation input for a service provided by the server. For example, when a password input is requested from the server, the input unit 101 inputs a password in response to the password input request. Then, the input unit 101 outputs operation input information, which is information input by operation (for example, a password input by operation), to the input management unit 102.
 入力管理部102は、入力部101から入力される操作入力情報に対応するサービスとして動作するアプリケーションへの操作入力情報の出力を管理する。例えば、入力管理部102は、入力部101から入力される操作入力情報を、その操作入力情報に対応するサービスとして動作するアプリケーションを実行する実行部103に出力する。また、入力管理部102は、操作入力情報を切替管理部108に出力する。 The input management unit 102 manages the output of operation input information to an application that operates as a service corresponding to the operation input information input from the input unit 101. For example, the input management unit 102 outputs the operation input information input from the input unit 101 to the execution unit 103 that executes an application that operates as a service corresponding to the operation input information. Further, the input management unit 102 outputs the operation input information to the switching management unit 108.
 実行部103は、入力管理部102から入力される操作入力情報または伝達部104から入力されるサーバからの受信データを用いて、サーバが提供するサービスとして動作するアプリケーションを実行する。例えば、サーバからパスワード入力要求が受信データとして入力された場合、実行部103は、パスワードを示す操作入力情報を用いてアプリケーションを実行する。そして、実行部103は、アプリケーションの実行結果である送信データを伝達部104を介してサーバに送信する。 The execution unit 103 uses the operation input information input from the input management unit 102 or the received data from the server input from the transmission unit 104 to execute an application that operates as a service provided by the server. For example, when a password input request is input as received data from the server, the execution unit 103 executes the application using operation input information indicating a password. Then, the execution unit 103 transmits transmission data that is an execution result of the application to the server via the transmission unit 104.
 伝達部104は、第1の通信網および第2の通信網のいずれかを介して、実行部103とサーバとの間の送信データおよび受信データの通信を行う。具体的には、伝達部104は、切替管理部108からの切り替え指示に従って、第1の通信網および第2の通信網のうちいずれを用いてサーバと通信するかを示す接続制御情報を、第1の通信網を用いる第1通信部105および第2の通信網を用いる第2通信部106に出力する。例えば、伝達部104は、通信網の接続を切り替える場合、第1通信部105および第2通信部106のうち、現在通信経路として用いている一方にサーバとの接続解放を要求し、接続切り替え後に通信経路として用いる他方にサーバとの接続を要求する。そして、伝達部104は、通信網の接続切り替えによりサーバと接続された通信部(第1通信部105または第2通信部106)を介して、サーバと実行部103との間の送信データおよび受信データの通信を行う。また、伝達部104は、サーバからの受信データのうち、自端末とサーバとの接続状態を示す接続状態情報を切替管理部108に出力する。接続状態情報には、例えば、実行部103からサーバへサービス要求が送信された状態を示す情報、または、実行部103の要求に対する応答がサーバから送信された状態を示す情報が含まれる。 The transmission unit 104 communicates transmission data and reception data between the execution unit 103 and the server via either the first communication network or the second communication network. Specifically, in accordance with the switching instruction from the switching management unit 108, the transmission unit 104 transmits connection control information indicating which of the first communication network and the second communication network is used to communicate with the server. The data is output to the first communication unit 105 using the first communication network and the second communication unit 106 using the second communication network. For example, when switching the connection of the communication network, the transmission unit 104 requests the one of the first communication unit 105 and the second communication unit 106 that is currently used as the communication path to release the connection with the server, and after switching the connection The other side used as the communication path is requested to connect to the server. Then, the transmission unit 104 transmits and receives transmission data and reception between the server and the execution unit 103 via the communication unit (the first communication unit 105 or the second communication unit 106) connected to the server by switching the connection of the communication network. Perform data communication. Further, the transmission unit 104 outputs connection state information indicating a connection state between the own terminal and the server among the received data from the server to the switching management unit 108. The connection state information includes, for example, information indicating a state in which a service request is transmitted from the execution unit 103 to the server, or information indicating a state in which a response to the request of the execution unit 103 is transmitted from the server.
 第1通信部105は、伝達部104から入力される接続制御情報に従って、サーバとの通信の通信路として第1の通信網(例えば、図1に示す網A)を用いる場合、サーバからの受信データおよび自端末からの送信データの通信を第1の通信網を経由して行う。また、第1通信部105は、第1の通信網が使用可能か否か、つまり、自端末が第1の通信網と接続されているか否かを示す第1接続情報を切替管理部108に出力する。 When the first communication unit 105 uses the first communication network (for example, the network A shown in FIG. 1) as a communication path for communication with the server according to the connection control information input from the transmission unit 104, the first communication unit 105 receives from the server. Communication of data and transmission data from the terminal is performed via the first communication network. In addition, the first communication unit 105 sends first connection information indicating whether or not the first communication network is usable, that is, whether or not the own terminal is connected to the first communication network, to the switching management unit 108. Output.
 第2通信部106は、伝達部104から入力される接続制御情報に従って、サーバとの通信の通信路として第2の通信網(例えば、図1に示す網B)を用いる場合、サーバからの受信データおよび自端末からの送信データの通信を第2の通信網を経由して行う。また、第2通信部106は、第2の通信網が使用可能か否か、つまり、自端末が第2の通信網と接続されているか否かを示す第2接続情報を切替管理部108に出力する。 When the second communication unit 106 uses the second communication network (for example, the network B shown in FIG. 1) as a communication path for communication with the server according to the connection control information input from the transmission unit 104, the second communication unit 106 receives from the server. Communication of data and transmission data from its own terminal is performed via the second communication network. The second communication unit 106 also sends second connection information indicating whether or not the second communication network is usable, that is, whether or not the terminal is connected to the second communication network, to the switching management unit 108. Output.
 計時部107は、切替管理部108から入力される接続状態情報に、自端末の要求に対するサーバからの応答(例えば、パスワード入力の要求)を示す情報が含まれる場合、その情報が入力された時間からの経過時間を計時する。そして、計時部107は、経過時間が予め設定された時間を経過した場合、予め設定された時間が経過したことを示す時間情報を切替管理部108に出力する。 When the connection state information input from the switching management unit 108 includes information indicating a response from the server to the request of the terminal itself (for example, a password input request), the time measuring unit 107 is the time when the information is input. The elapsed time from is timed. Then, when the elapsed time exceeds a preset time, the time measuring unit 107 outputs time information indicating that the preset time has elapsed to the switching management unit 108.
 切替管理部108は、自端末とサーバとの間の通信経路としての第1の通信網および第2の通信網の接続切り替えを管理する。具体的には、切替管理部108は、まず、第1通信部105から入力される第1接続情報、および、第2通信部106から入力される第2接続情報に基づいて、使用可能な通信網を特定する。例えば、切替管理部108は、現在接続している第1の通信網よりも優先される(例えば、第1の通信網よりも高速である)第2の通信網が使用可能な場合には、第1の通信網から第2の通信網への接続切り替えを行うように、伝達部104に指示する。また、切替管理部108は、伝達部104から入力される接続状態情報に、自端末の要求に対するサーバからの応答が含まれる場合、その接続状態情報を計時部107に出力する。そして、切替管理部108は、計時部107から時間情報が入力されると(すなわち、予め設定された時間が経過すると)、接続切り替えを行うように、伝達部104に指示する。ただし、切替管理部108は、計時部107から時間情報が入力されるまでに、入力管理部102からの操作入力情報を検出した場合、通信網の接続切り替えを行わないように、伝達部104に指示する。 The switching management unit 108 manages connection switching between the first communication network and the second communication network as a communication path between the own terminal and the server. Specifically, the switching management unit 108 first uses available communication based on the first connection information input from the first communication unit 105 and the second connection information input from the second communication unit 106. Identify the net. For example, when the second communication network that is prioritized over the first communication network that is currently connected (for example, faster than the first communication network) can be used, the switching management unit 108 The transmission unit 104 is instructed to switch the connection from the first communication network to the second communication network. In addition, when the connection status information input from the transmission unit 104 includes a response from the server to the request of the terminal itself, the switching management unit 108 outputs the connection status information to the time measuring unit 107. Then, when time information is input from the time measuring unit 107 (that is, when a preset time has elapsed), the switching management unit 108 instructs the transmission unit 104 to perform connection switching. However, if the switching management unit 108 detects operation input information from the input management unit 102 before the time information is input from the time measuring unit 107, the switching management unit 108 does not switch the connection of the communication network. Instruct.
 次に、端末100における通信網の接続切り替え処理の詳細について説明する。 Next, details of communication network connection switching processing in the terminal 100 will be described.
 以下、具体的に説明する。ここでは、端末100とサーバとの間のサービスの一例としてパスワード認証について説明する。また、端末100は図1に示す網Aに位置し、網Cに位置するサーバAとの間でパスワード認証を行う。また、端末100は、通信経路として網Aを経由してサーバAと通信を行う。また、パスワード認証を行う際、サーバAは、サービスを要求する要求元のIPアドレスに基づいて、複数の端末を区別する。 The details will be described below. Here, password authentication will be described as an example of a service between the terminal 100 and the server. The terminal 100 is located on the network A shown in FIG. 1 and performs password authentication with the server A located on the network C. Further, the terminal 100 communicates with the server A via the network A as a communication path. Further, when performing password authentication, the server A distinguishes a plurality of terminals based on the IP address of the request source requesting the service.
 図5に端末100とサーバAとの間でパスワード認証を行う場合のシーケンス図を示す。図5において、図2と同一の処理には同一符号を付し、説明を省略する。 FIG. 5 shows a sequence diagram when password authentication is performed between the terminal 100 and the server A. In FIG. 5, the same processes as those in FIG.
 図5において、ST7までの処理を行った後に、端末100が図1に示す網Aのカバーエリアと網Bのカバーエリアとが重複するエリアに移動したとする。この場合、ST16では、端末100は、サーバAとの通信経路として網Aから網Bに接続を切り替えるか否かを判断する。 5, it is assumed that after the processing up to ST7 is performed, the terminal 100 moves to an area where the cover area of the network A and the cover area of the network B shown in FIG. 1 overlap. In this case, in ST16, terminal 100 determines whether or not to switch connection from network A to network B as a communication path with server A.
 端末100における通信網の接続切り替え処理の流れを図6に示す。図6において、図3と同一の処理には同一符号を付し、説明を省略する。ST103では、切替管理部108は、入力管理部102から操作入力情報の入力が有るか否かを判断する。操作入力情報が検出されない場合、つまり、操作入力情報の入力が無い場合(ST103:NO)、ST102に進む。一方、操作入力情報が検出された場合、つまり、操作入力情報の入力が有る場合(ST103:YES)、切替管理部108は、通信網の接続切り替え(ST102)を行わないように、伝達部104に指示する。伝達部104は、切替管理部108から接続切り替えを行わないように指示された場合には、優先度がより高い通信網への接続切り替えが可能な場合でも通信網の接続切り替えを行わない。 The flow of communication network connection switching processing in the terminal 100 is shown in FIG. In FIG. 6, the same processes as those in FIG. In ST103, switching management section 108 determines whether or not operation input information is input from input management section 102. When operation input information is not detected, that is, when there is no input of operation input information (ST103: NO), the process proceeds to ST102. On the other hand, when the operation input information is detected, that is, when the operation input information is input (ST103: YES), the switching management unit 108 does not perform connection switching (ST102) of the communication network. To instruct. When instructed not to perform connection switching from the switching management unit 108, the transmission unit 104 does not perform communication network connection switching even when connection switching to a communication network with a higher priority is possible.
 よって、図5に示すST16では、切替管理部108は、入力管理部102からの操作入力情報を検出し、通信網の接続切り替え(図6に示すST102)を行わないように、伝達部104に指示する。 Therefore, in ST16 shown in FIG. 5, the switching management unit 108 detects the operation input information from the input management unit 102 and instructs the transmission unit 104 not to switch the communication network connection (ST102 shown in FIG. 6). Instruct.
 ST17では、端末100は、サーバA宛てのパスワードを、ST2の表示要求の送信と同様、図1に示すGW1に送信する。ST18では、GW1は、ST3と同様、端末100からのパスワードの送信元アドレスを網Cの自己のIPアドレス(IP-A)に変換して、送信元アドレスが変換されたパスワードをサーバAへ送信する。 In ST17, the terminal 100 transmits the password addressed to the server A to the GW1 shown in FIG. 1 in the same manner as the transmission of the display request in ST2. In ST18, as in ST3, GW1 converts the source address of the password from terminal 100 into its own IP address (IP-A) of network C, and transmits the password with the source address converted to server A. To do.
 サーバAは、パスワード入力データの送信先アドレスがIP-Aであり、パスワードの送信元アドレスがIP-Aであるため、パスワード入力データの送信先の端末と同一端末からパスワードが送信されたと認識し、パスワード認証に成功する(ST19)。ST20では、サーバAは、パスワード送信の応答として、例えば、パスワード入力画面の次の画面である次画面データを、パスワードの送信元(IP-A)であるGW1へ送信する。ST21では、GW1は、アドレス逆変換を行い、次画面データを端末100へ送信する。ST22では、端末100は、次画面データを表示する。 The server A recognizes that the password is transmitted from the same terminal as the password input data transmission destination because the password input data transmission destination address is IP-A and the password transmission source address is IP-A. The password authentication is successful (ST19). In ST20, as a response to password transmission, server A transmits, for example, next screen data, which is the next screen of the password input screen, to GW1, which is a password transmission source (IP-A). In ST <b> 21, GW 1 performs address reverse conversion and transmits next screen data to terminal 100. In ST22, terminal 100 displays next screen data.
 このように、端末100は、操作入力を検出した場合、操作入力の前後で送信される複数の要求の間には関連性があると判断し、通信網の接続切り替えを行わない。そのため、互いに関連のある複数の要求の間に通信網の接続を切り替えることでサービスが継続できなくなることを防止できる。すなわち、端末100は、操作入力を検出した場合、前回の要求(図5に示すST2の表示要求)時に接続していた通信網で今回の要求(図5に示すST17のパスワード送信)時もサーバと接続する必要があると判断し、前回の要求送信時と同一の通信網(ここでは、図1に示す網A)でサーバと接続することができる。 Thus, when the terminal 100 detects an operation input, the terminal 100 determines that there is a relationship between a plurality of requests transmitted before and after the operation input, and does not perform connection switching of the communication network. Therefore, it is possible to prevent the service from being continued by switching the communication network connection between a plurality of requests related to each other. That is, when the terminal 100 detects an operation input, the server 100 also serves as a server during this request (ST17 password transmission shown in FIG. 5) in the communication network connected at the previous request (ST2 display request shown in FIG. 5). It is possible to connect to the server via the same communication network (here, network A shown in FIG. 1) as the previous request transmission.
 このように、本実施の形態では、端末は、操作入力を検出した場合、通信網の接続切り替えが可能である場合でも、接続切り替えを行わない。すなわち、端末は、互いに関連のある複数の要求の間の通信網の接続の切り替えを制限することにより、その複数の要求からなるサービスを継続することができる。一方、端末は、複数の要求の間に通信網の接続を切り替えてもサービスに問題がない場合(ここでは、複数の要求の間に操作入力が無い場合)には、通信網の接続を切り替えることにより、サーバとの間でより適した通信を行うことができる。よって、本実施の形態によれば、サーバからのサービスを正常に実行しつつ、より適した通信網への接続切り替えを行うことができる。 As described above, in this embodiment, the terminal does not perform connection switching even when the connection switching of the communication network is possible when the operation input is detected. That is, the terminal can continue the service including the plurality of requests by restricting the switching of the communication network connection between the plurality of requests related to each other. On the other hand, if there is no problem in the service even if the communication network connection is switched between a plurality of requests (in this case, there is no operation input between the plurality of requests), the terminal switches the communication network connection. Thus, more suitable communication can be performed with the server. Therefore, according to the present embodiment, connection switching to a more suitable communication network can be performed while the service from the server is normally executed.
 (実施の形態2)
 サーバによっては、パスワード認証のように互いに関連のある複数の要求の間で端末との通信経路が変更されても、問題無くサービスの提供を継続できる場合がある。例えば、サーバがパスワード入力の要求とともに、その要求に対して固有の識別子を割り当てるとする。そして、サーバは、その固有の識別子とともにパスワードを送信するように端末に指示する。これにより、パスワード入力の要求時のパスワード入力要求の送信先IPアドレスと、パスワード受信時のパスワード送信元IPアドレスとが異なる場合でも、サーバは、固有の識別子が同一であれば同一端末からのパスワードであると判断することができる。
(Embodiment 2)
Depending on the server, even if the communication path with the terminal is changed between a plurality of requests that are related to each other, such as password authentication, the service can be continued without problems. For example, suppose that the server assigns a unique identifier to a request together with a password input request. The server then instructs the terminal to send a password along with its unique identifier. As a result, even if the destination IP address of the password input request at the time of password input request is different from the password source IP address at the time of password reception, the server can use the password from the same terminal as long as the unique identifier is the same. Can be determined.
 端末は、上述したような、通信経路が変更されても端末を正確に区別することができるサーバからサービスを提供される場合には、実施の形態1で説明した通信網の接続切り替え管理を行う必要がない。換言すると、端末は、サービスを提供中に通信網の接続切り替えを行うとサービスを継続できなくなる問題が発生するサーバからサービスを提供される場合にのみ、実施の形態1で説明した通信網の接続切り替えを行えばよい。 When the terminal is provided with a service from a server that can accurately distinguish the terminal even when the communication path is changed as described above, the terminal performs connection switching management of the communication network described in the first embodiment. There is no need. In other words, the connection of the communication network described in the first embodiment is performed only when the terminal is provided with a service from a server that causes a problem that the service cannot be continued if the connection of the communication network is switched while providing the service. Switching may be performed.
 そこで、本実施の形態では、端末は、サービスを提供中に通信網の接続切り替えを行うとサービスを継続できなくなる問題が発生するサーバを記憶し、自端末にサービスを提供するサーバが、記憶しているサーバと一致する場合、通信網の接続切り替えを行わない。 Therefore, in the present embodiment, the terminal stores a server that causes a problem that the service cannot be continued if the connection of the communication network is switched while providing the service, and the server that provides the service to the terminal stores the server. Do not switch connection of communication network if it matches with the current server.
 本実施の形態における端末200の構成を図7に示す。図7において、実施の形態1(図4)と同一の構成には同一符号を付し、説明を省略する。 FIG. 7 shows the configuration of terminal 200 in the present embodiment. In FIG. 7, the same components as those in the first embodiment (FIG. 4) are denoted by the same reference numerals, and description thereof is omitted.
 図7に示す端末200において、記憶部201は、サービスを提供中に通信網の接続切り替えを行うとサービスを継続できなくなる問題が発生するサーバを記憶する。例えば、記憶部201は、サーバのIPアドレスを記憶する。ここで、記憶部201は、サービスを提供中に通信網の接続切り替えを行うとサービスを継続できなくなる問題が発生するサーバを予め記憶してもよい。また、端末200は、システムから通知される情報に基づいて、記憶部201で記憶されるサーバの情報を更新してもよい。または、端末200は、ユーザの判断により、記憶部201で記憶されるサーバを決定してもよい。 In the terminal 200 shown in FIG. 7, the storage unit 201 stores a server in which there is a problem that the service cannot be continued if the connection of the communication network is switched while the service is being provided. For example, the storage unit 201 stores the IP address of the server. Here, the storage unit 201 may store in advance a server that causes a problem that the service cannot be continued if the connection of the communication network is switched while the service is being provided. The terminal 200 may update the server information stored in the storage unit 201 based on information notified from the system. Or the terminal 200 may determine the server memorize | stored in the memory | storage part 201 by a user's judgment.
 切替管理部108には、実施の形態1と同様、操作入力情報が入力管理部102から入力され、さらに、自端末にサービスを提供するサーバの情報(例えば、サーバのIPアドレス)を含む接続状態情報が伝達部104から入力される。そして、切替管理部108は、操作入力情報を検出し、かつ、接続状態情報に含まれるサーバの情報に示されるサーバ(つまり、自端末にサービスを提供するサーバ)が記憶部201に記憶されているサーバと一致する場合、通信網の接続切り替えを行わないように、伝達部104に指示する。 As in the first embodiment, the switching management unit 108 receives operation input information from the input management unit 102 and further includes information on the server that provides the service to the terminal itself (for example, the IP address of the server). Information is input from the transmission unit 104. Then, the switching management unit 108 detects the operation input information, and the server indicated by the server information included in the connection state information (that is, the server that provides the service to its own terminal) is stored in the storage unit 201. If it matches the existing server, the transmission unit 104 is instructed not to switch the connection of the communication network.
 このように、本実施の形態によれば、端末200は、記憶部201に記憶されているサーバ(すなわち、複数の要求の間における通信網の接続切り替えによりサービスを継続できないサーバ)との間で通信している場合には、実施の形態1と同様、操作入力が検出されると通信網の接続切り替えを行わない。これにより、実施の形態1と同様、通信網の接続切り替えによりサービスが継続できなくなることを防止し、サービスを正常に実施することができる。 As described above, according to the present embodiment, terminal 200 communicates with a server stored in storage unit 201 (that is, a server that cannot continue a service due to communication network connection switching between a plurality of requests). When communicating, as in the first embodiment, when an operation input is detected, connection switching of the communication network is not performed. Accordingly, as in the first embodiment, it is possible to prevent the service from being continued due to the connection switching of the communication network, and to perform the service normally.
 さらに、本実施の形態によれば、端末200は、記憶部201に記憶されていないサーバ(すなわち、複数の要求の間における通信網の接続切り替えに対応するサーバ)との間で通信している場合には、操作入力の有無に関わらず、より良い通信網への接続が可能な時点で通信網の接続切り替えを行うことができる。 Furthermore, according to the present embodiment, terminal 200 is communicating with a server that is not stored in storage unit 201 (that is, a server that supports communication network connection switching between a plurality of requests). In this case, the connection of the communication network can be switched when a better connection to the communication network is possible regardless of whether or not there is an operation input.
 (実施の形態3)
 端末の要求に対するサーバからの応答の一例として、パスワード入力を要求するパスワード入力データ(図2および図5)に含まれるHTML(Hyper Text Markup Language)タグの一例を図8Aに示す。
(Embodiment 3)
FIG. 8A shows an example of an HTML (Hyper Text Markup Language) tag included in password input data (FIGS. 2 and 5) requesting password input as an example of a response from the server to a terminal request.
 図8Aにおいて、1行目および6行目は、HTMLデータであることを示す。また、2行目~5行目のform要素は、端末からサーバへの返信方法の定義を示し、input要素は、その返信データの入力形式の指示を示す。 In FIG. 8A, the first and sixth lines indicate HTML data. The form element in the second to fifth lines indicates the definition of the reply method from the terminal to the server, and the input element indicates the input format of the reply data.
 具体的には、図8Aの2行目では、’method=GET’は、データをサーバに返信する方法が‘GET’であることを示し、‘action="0.html"’は、宛先が‘0.html’であることを示す。また、図8Aの3行目では、‘type="text"’は、返信内容がテキスト形式であることを示し、‘name="ans"’は、入力されるデータの変数名が‘ans’であることを示す。なお、図8Aの3行目の先頭の‘input password:’は、単にユーザに何の入力であるかを示す表示用の記述である。また、図8Aの4行目では、‘type="submit"’は、返信の指示方法が返信ボタンであることを示し、‘value="send"’は、返信ボタン上に文字列‘send’を表示することを示す。なお、3,4行目の<br>は改行を示す。 Specifically, in the second line of FIG. 8A, 'method = GET' indicates that the method for returning data to the server is 'GET', and 'action = "0.html"' indicates that the destination is '0. Indicates html '. In the third line of FIG. 8A, 'type = "text"' indicates that the reply content is in text format, and 'name = "ans"' indicates that the variable name of the input data is 'ans'. Indicates that Note that “input password:” at the top of the third line in FIG. 8A is simply a display description indicating what input is to the user. Further, in the fourth line of FIG. 8A, “type =“ submit ”” indicates that the reply instruction method is a reply button, and “value =“ send ”” indicates a character string “send” on the reply button. Is displayed. In the third and fourth lines, <br> indicates a line feed.
 図8Aに示すHTMLデータを実行すると、図8B上段に示す内容が表示される。具体的には、図8B上段に示すように、図8Aの3行目に対応して、返信の編集エリアが表示され、図8Aの4行目に対応して、返信の送信ボタンが表示される。 When the HTML data shown in FIG. 8A is executed, the contents shown in the upper part of FIG. 8B are displayed. Specifically, as shown in the upper part of FIG. 8B, a reply editing area is displayed corresponding to the third line in FIG. 8A, and a reply sending button is displayed corresponding to the fourth line in FIG. 8A. The
 次いで、図8B下段に示すように、返信データとして‘12’が入力され、返信の送信ボタンがクリックされると、ブラウザのURL(Uniform Resource Locator)エリアには、‘http://0.html?ans=12’と表示される。ここで、‘http://’は、サーバとの通信に使用されるプロトコルがHTTP(Hyper Text Transfer Protocol)であることを示し、‘0.html’は図8Aの2行目で指定した返信データの宛先を示し、‘?’は宛先と返信データとを分離する分離文字を示し、‘ans=12’は返信データが12であることを示す。 Next, as shown in the lower part of FIG. 8B, when “12” is input as reply data and the reply send button is clicked, the URL (Uniform Resource Locator) area of the browser contains “http: //0.html. ? ans = 12 'is displayed. Here, “http: //” indicates that the protocol used for communication with the server is HTTP (Hyper Text Text Transfer Protocol), and “0.html” is the reply specified in the second line of FIG. 8A. The destination of data is indicated, “?” Indicates a separation character for separating the destination and the reply data, and “ans = 12” indicates that the reply data is 12.
 なお、データをサーバに返信する方法として、‘GET’の他に‘POST’等もある。 As a method of returning data to the server, there is “POST” in addition to “GET”.
 このように、端末の要求に対するサーバからの応答には、操作入力による端末の返信(図8A,Bではパスワード)を要求する情報が含まれることがある。よって、端末は、サーバから送信されるデータ(応答)に、例えば、上述した返信方法の定義(‘method=GET’および‘method=POST’等)または入力形式の指定(‘input’)を示すHTMLタグが含まれる場合には、サーバからのデータ(応答)に対して自端末がさらに返信する必要があると判断できる。つまり、端末は、サーバから送信されるデータに、操作入力による端末の返信を要求する情報が含まれる場合、そのデータの前後に自端末がサーバへ送信する複数の要求を、1つのサービスを構成する要求(互いに関連のある要求)であると判断することができる。 As described above, the response from the server to the request for the terminal may include information for requesting the reply of the terminal by the operation input (the password in FIGS. 8A and 8B). Accordingly, the terminal indicates, for example, the above-described reply method definition (such as 'method = GET' and 'method = POST') or input format designation ('input') in the data (response) transmitted from the server. When the HTML tag is included, it can be determined that the terminal itself needs to further reply to the data (response) from the server. That is, when the data transmitted from the server includes information requesting a reply from the terminal by an operation input, the terminal configures a plurality of requests that the terminal transmits to the server before and after the data as one service. It is possible to determine that the requests are requests (related requests).
 そこで、本実施の形態では、端末は、サーバから送信されるデータ(応答)に、操作入力による返信を要求する情報(例えば、図8Aに示すHTMLタグ)が含まれる場合、通信網の接続切り替えを行わない。 Therefore, in the present embodiment, when the data (response) transmitted from the server includes information (for example, an HTML tag shown in FIG. 8A) requesting a reply by an operation input, the terminal switches the communication network connection. Do not do.
 以下、具体的に説明する。本実施の形態に係る端末100(図4)では、入力管理部102から切替管理部108へ入力される操作入力情報が不要となる。図4に示す端末100において、切替管理部108には、自端末にサービスを提供するサーバからの応答である受信データ(例えば、図8Aに示すHTMLタグ)を含む接続状態情報が伝達部104から入力される。そして、切替管理部108は、サーバからの受信データに、操作入力による返信を要求する情報(図8Aでは‘method=GET’または‘input’)が含まれる場合、通信網の接続切り替えを行わないように、伝達部104に指示する。 The details will be described below. In terminal 100 (FIG. 4) according to the present embodiment, operation input information input from input management unit 102 to switching management unit 108 becomes unnecessary. In the terminal 100 illustrated in FIG. 4, the switching management unit 108 receives connection state information including reception data (for example, an HTML tag illustrated in FIG. 8A) as a response from a server that provides a service to the terminal from the transmission unit 104. Entered. Then, the switching management unit 108 does not switch the connection of the communication network when the data received from the server includes information (“method = GET” or “input” in FIG. 8A) requesting a reply by an operation input. Thus, the transmission unit 104 is instructed.
 すなわち、切替管理部108は、サーバからの受信データに、操作入力による返信を要求する情報が含まれる場合には、入力部101において、その受信データに対する操作入力処理が行われると判断する。つまり、切替管理部108は、サーバからの受信データに、操作入力による返信を要求する情報が含まれる場合には、その受信データの前後で送信される複数の要求の間には関連性あると判断し、通信網の接続切り替えを行わない。 That is, when the received data from the server includes information requesting a reply by an operation input, the switching management unit 108 determines that the input unit 101 performs an operation input process on the received data. That is, when the data received from the server includes information requesting a reply by an operation input, the switching management unit 108 determines that there is a relationship between a plurality of requests transmitted before and after the received data. The communication network connection is not switched.
 一方、切替管理部108は、サーバからの受信データに、操作入力による返信を要求する情報が含まれない場合には、入力部101において、その受信データに対する操作入力が行われないと判断する。この場合、切替管理部108は、より適した通信網への接続切り替えが可能であれば、通信網の切り替えを行うように伝達部104に指示する。 On the other hand, when the data received from the server does not include information requesting a reply by operation input, the switching management unit 108 determines that the input unit 101 does not perform operation input for the received data. In this case, the switching management unit 108 instructs the transmission unit 104 to switch the communication network if connection switching to a more suitable communication network is possible.
 このようにして、本実施の形態によれば、端末100は、実施の形態1と同様、互いに関連のある複数の要求からなるサービスが行われる間、通信網の接続切り替えを行わない。よって、本実施の形態によれば、実施の形態1と同様の効果を得ることができる。 Thus, according to the present embodiment, as in the first embodiment, the terminal 100 does not switch the connection of the communication network while a service including a plurality of requests related to each other is performed. Therefore, according to the present embodiment, the same effect as in the first embodiment can be obtained.
 なお、本実施の形態では、返信方法の定義(‘method=GET’および‘method=POST’等)および入力形式の指定(‘input’)がサーバからの受信データに含まれている場合を一例として説明した。しかし、本発明では、返信方法の定義(‘method=GET’および‘method=POST’等)および入力形式の指定(‘input’)に限らず、サーバに返信するためのコマンドがサーバからの受信データに含まれていればよい。 In the present embodiment, an example of the case where the definition of the reply method ('method = GET', 'method = POST', etc.) and the input format specification ('input') are included in the received data from the server is an example. As explained. However, in the present invention, not only the reply method definition (such as 'method = GET' and 'method = POST') and the input format designation ('input'), but also a command for replying to the server is received from the server. It only has to be included in the data.
 以上、本発明の実施の形態について説明した。 The embodiment of the present invention has been described above.
 なお、上記実施の形態では、操作入力の一例としてパスワード認証におけるパスワード入力を行う場合について説明した。しかし、本発明では、操作入力は、パスワード入力に限らず、例えば、メール編集、電子掲示板、または、チャットにおける文字入力でもよい。 In the above embodiment, the case where password input in password authentication is performed as an example of operation input has been described. However, in the present invention, the operation input is not limited to the password input, and may be, for example, a mail edit, an electronic bulletin board, or a character input in chat.
 2008年10月2日出願の特願2008-257022の日本出願に含まれる明細書、図面および要約書の開示内容は、すべて本願に援用される。 The disclosure of the specification, drawings and abstract contained in the Japanese application of Japanese Patent Application No. 2008-257022 filed on October 2, 2008 is incorporated herein by reference.
 本発明は、通信システム等に適用することができる。 The present invention can be applied to communication systems and the like.

Claims (3)

  1.  自装置と、自装置にサービスを提供中のサーバとの間の通信経路としての第1の通信網および第2の通信網の接続切り替えを管理する管理手段と、
     前記サービスに対して操作入力を行う入力手段と、を具備し、
     前記管理手段は、前記操作入力を検出した場合、または、前記サーバから送信されるデータに前記操作入力による返信を要求する情報が含まれる場合、前記接続切り替えを行わない、
     端末装置。
    Management means for managing connection switching between the first communication network and the second communication network as a communication path between the own device and a server providing a service to the own device;
    Input means for performing an operation input to the service,
    The management means does not perform the connection switching when the operation input is detected, or when the data transmitted from the server includes information requesting a reply by the operation input.
    Terminal device.
  2.  前記サービスを提供中に前記接続切り替えを行うと問題が発生するサーバを記憶する記憶手段、をさらに具備し、
     前記管理手段は、前記操作入力を検出し、かつ、自装置に前記サービスを提供するサーバが前記記憶手段に記憶されたサーバと一致する場合、前記接続切り替えを行わない、
     請求項1記載の端末装置。
    Storage means for storing a server that causes a problem when the connection is switched while providing the service;
    The management unit detects the operation input, and does not perform the connection switching when a server that provides the service to its own device matches a server stored in the storage unit.
    The terminal device according to claim 1.
  3.  端末装置と、前記端末装置にサービスを提供中のサーバとの間の通信経路としての第1の通信網および第2の通信網の接続切り替えを管理する接続切り替え管理方法において、
     前記サービスに対する操作入力を検出した場合、または、前記サーバから送信されるデータに前記操作入力による返信を要求する情報が含まれる場合、前記接続切り替えを行わない、
     接続切り替え管理方法。
    In a connection switching management method for managing connection switching between a first communication network and a second communication network as a communication path between a terminal device and a server providing a service to the terminal device,
    When the operation input for the service is detected, or when the data transmitted from the server includes information requesting a reply by the operation input, the connection switching is not performed.
    Connection switching management method.
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